Eccentric large-diameter flange butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to an eccentric large-diameter flange butterfly valve. The eccentric large-diameter flange butterfly valve comprises a valve body, flange rings are fixedly embedded in the two sides of the valve body, and connecting holes are formed in the flange rings. The outer ring wall of the valve body is provided with a plurality of sets of annularly-distributed middle connecting parts. According to the eccentric large-diameter flange butterfly valve fastening nut, before the threaded rod is inserted into a pipeline flange hole, the sleeving ring on the sliding rod is limited and the spring is compressed, and after the threaded rod is inserted into the pipeline flange hole, the sleeving ring on the sliding rod is sleeved with the spring. The fastening nuts can be directly installed on the threaded rods so that the valve body can be fixedly connected with the pipeline flange, the fastening nuts and the threaded rods are in one-to-one correspondence, operation of workers is facilitated, and therefore when the large-diameter eccentric flange butterfly valve is connected with the pipeline, the workers do not need to carry a large number of bolts, and the work efficiency is improved. And bolts do not need to penetrate through connecting flanges one by one to be connected with pipelines, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to an eccentric large-diameter flange butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a regulating valve with a simple structure that can be used for the on-off control of low-pressure pipeline media. The closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulation. The butterfly valve has the advantages of simple structure, small size, light weight, low material consumption, small installation size, small driving torque, easy and quick operation, good adjustment performance, and the butterfly plate can be opened and closed quickly. At the same time, due to the use of an eccentric structure, it can better adapt to various working conditions and improve the service life and sealing performance of the valve. The butterfly valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. The eccentric flange butterfly valve, which mainly plays the role of cutting off and throttling on the pipeline, is a butterfly valve with an eccentric valve stem;

[0003] The eccentric flange butterfly valve is equipped with flange structures connected to the connecting pipeline at both ends. The flange structure is fixed to the valve body at the factory. As a result, when some large-diameter eccentric flange butterfly valves are connected to pipelines, a large number of bolts are required for the flange rings. The staff need to use bolts to connect them to the pipelines one by one. In this process, the staff need to carry a large number of bolts, and then take the bolts and pass them through the flange holes. Sometimes, it is easy to cause problems such as bolts falling off, which is very cumbersome, time-consuming and labor-intensive.

[0004] Therefore, it is necessary to provide a new eccentric large-diameter flange butterfly valve to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an eccentric large-diameter flange butterfly valve.

[0006] The utility model provides an eccentric large-diameter flange butterfly valve comprising a valve body, both sides of which are fixedly embedded with flange rings, and the flange rings are provided with a plurality of annularly distributed connection holes;

[0007] The outer wall of the valve body is provided with a plurality of groups of annularly distributed middle connecting components, and the middle connecting components include a connecting plate, the lower plate wall of the connecting plate is fixedly mounted on the outer wall of the valve body through a vertical rod, and the two end surfaces of the connecting plate are fixedly engaged with coaxially arranged sliding rods, and the rod sections of the two sliding rods facing each other are both provided with threaded sections;

[0008] Each of the sliding rods is provided with a connecting tube assembly, and the connecting tube assembly includes a sleeve ring, the sleeve ring is sleeved on the sliding rod and slidably connected with the sliding rod, and a threaded rod is installed on the sleeve ring, and the other end of the threaded rod is inserted into the connecting hole corresponding to the flange ring;

[0009] A threaded fastening nut is sleeved on the threaded section of the sliding rod.

[0010] Preferably, a connecting rod is fixedly mounted on the outer ring wall of the sleeve ring, and a rod cap is fixedly mounted on the other end of the connecting rod, and the threaded rod is fixedly mounted on the rod cap.

[0011] Preferably, a spring is sleeved on the sliding rod, one end of the spring is fixedly connected to the end surface of the connecting disk, and the other end of the spring is fixedly connected to the inner ring wall of the sleeve ring.

[0012] Preferably, the threaded rod and the threaded section on the sliding rod have the same specifications.

[0013] Preferably, the connection plate is located in the middle of the valve body, and the distances between the ends of the sliding rods on both sides of the connection plate and the flange rings on both sides are the same.

[0014] Preferably, the length of the sleeve ring is greater than the distance from the end of the sliding rod to the flange ring.

[0015] Compared with the related art, the eccentric large-diameter flange butterfly valve provided by the utility model has the following beneficial effects:

[0016] 1. The utility model unscrews the fastening nut of the threaded section on the sliding rod, so that under the action of the compression spring, the sleeve ring slides along the sliding rod toward the rod head end thereof, so that the threaded rod passes through the connecting hole on the flange ring and the corresponding flange hole on the pipeline. After completion, the removed fastening nut is sleeved on the threaded rod and tightened, thereby completing the connection between the valve body and the pipeline, which is simple and convenient, and no manual bolts are required;

[0017] 2. Before the threaded rod is inserted into the pipe flange hole, the fastening nut of the utility model limits the sleeve ring on the sliding rod and compresses the spring. After the threaded rod is inserted into the pipe flange hole, the fastening nut can be directly installed on the threaded rod to fix the valve body and the pipe flange. The one-to-one correspondence between the fastening nut and the threaded rod facilitates the operation of the staff. Therefore, for the connection of large-diameter eccentric flange butterfly valves with pipelines, the staff does not need to carry a large number of bolts, and there is no need to use bolts to pass through the connecting flange and the pipeline one by one, which saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural schematic diagram of a preferred embodiment of an eccentric large-diameter flange butterfly valve provided by the utility model;

[0019] Figure 2 for Figure 1 The schematic diagram of the installation structure of the intermediate coupling component on the valve body is shown;

[0020] Figure 3 for Figure 2 Schematic diagram of the structure of the center link components.

[0021] Numbers in the figure: 1, valve body; 2, flange ring; 2a, connecting hole; 3, central connecting component; 31, connecting plate; 32, vertical rod; 33, sliding rod; 331, threaded section; 34, connecting pipe assembly; 341, sleeve ring; 342, connecting rod; 343, rod cap; 344, threaded rod; 35, fastening nut; 36, spring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] See also Figures 1 to 3 An embodiment of the utility model provides an eccentric large-diameter flange butterfly valve, which includes: a valve body 1, a flange ring 2 and a central link component 3. Flange rings 2 are fixedly embedded on both sides of the valve body 1, and the flange ring 2 is provided with a plurality of annularly distributed connecting holes 2a, and the outer ring wall of the valve body 1 is provided with a plurality of groups of annularly distributed central link components 3.

[0025] In the embodiments of the present invention, please refer to Figure 1 , Figure 2 and Figure 3 The middle connecting component 3 includes a connecting plate 31, the lower plate wall of the connecting plate 31 is fixedly mounted on the outer wall of the valve body 1 through a vertical rod 32, and the two end surfaces of the connecting plate 31 are fixedly engaged with coaxially arranged sliding rods 33, and the two opposite rod sections of the two sliding rods 33 are both provided with threaded sections 331, and the threaded sections 331 of the sliding rods 33 are sleeved with threaded fastening nuts 35;

[0026] Each of the sliding rods 33 is provided with a connecting tube assembly 34, and the connecting tube assembly 34 includes a sleeve ring 341, the sleeve ring 341 is sleeved on the sliding rod 33 and slidably connected with the sliding rod 33, and a threaded rod 344 is installed on the sleeve ring 341, specifically, a connecting rod 342 is fixedly installed on the outer ring wall of the sleeve ring 341, and a rod cap 343 is fixedly installed on the other end of the connecting rod 342, the threaded rod 344 is fixedly installed on the rod cap 343, and the other end of the threaded rod 344 is inserted into the corresponding connecting hole 2a of the flange ring 2, and a spring 36 is sleeved on the sliding rod 33, one end of the spring 36 is fixedly connected to the end surface of the connecting plate 31, and the other end of the spring 36 is fixedly connected to the inner ring wall of the sleeve ring 341;

[0027] It should be noted that: when the valve body 1 is connected to the pipeline, the connection holes 2a of the flange rings 2 on both sides of the valve body 1 are aligned with the flanges on the pipeline, and the fastening nuts 35 of the threaded sections 331 on the sliding rod 33 are screwed down, so that under the action of the compression spring 36, the sleeve ring 341 slides along the sliding rod 33 toward its rod head end, so that the threaded rod 344 passes through the connection holes 2a on the flange ring 2 and the corresponding flange holes on the pipeline. After completion, the removed fastening nuts 35 are sleeved on the threaded rod 344 and tightened, thereby completing the connection between the valve body 1 and the pipeline, which is simple and convenient, and no manual bolts need to be carried;

[0028] At the same time, before the threaded rod 344 is inserted into the pipe flange hole, the fastening nut 35 restricts the sleeve ring 341 on the sliding rod 33 and compresses the spring 36. After the threaded rod 344 is inserted into the pipe flange hole, the fastening nut 35 can be directly installed on the threaded rod 344 to fix the valve body 1 and the pipe flange. The one-to-one correspondence between the fastening nut 35 and the threaded rod 344 is convenient for the staff to operate. Therefore, for the connection of a large-diameter eccentric flange butterfly valve with a pipeline, the staff does not need to carry a large number of bolts, and does not need to use bolts to pass through the connecting flange and connect with the pipeline one by one, which saves time and effort.

[0029] The spring 36 is provided so that after the fastening nut 35 on the sliding rod 33 is screwed down, the threaded rod 344 can pass through the connecting hole 2a on the flange ring 2 and the corresponding flange hole on the pipeline, without manual processing, thus reducing the work procedures of the staff;

[0030] Among them, the connecting plate 31 is located in the middle of the valve body 1, and the ends of the sliding rods 33 on both sides of the connecting plate 31 are at the same distance from the flange rings 2 on both sides, and the length of the sleeve ring 341 is greater than the distance from the end of the sliding rod 33 to the flange ring 2, so that the sleeve ring 341 can be abutted against the inner side of the flange ring 2 under the elastic force of the spring 36, thereby avoiding the problem of shaking of the threaded rod 344 when the butterfly valve is connected to the pipeline flange.

[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An eccentric large-diameter flange butterfly valve, comprising a valve body (1), flange rings (2) fixedly engaged on both sides of the valve body (1), and a plurality of annularly distributed connecting holes (2a) are provided on the flange ring (2), characterized in that: The outer wall of the valve body (1) is provided with a plurality of groups of annularly distributed middle connecting components (3), and the middle connecting component (3) comprises a connecting plate (31), the lower plate wall of the connecting plate (31) is fixedly mounted on the outer wall of the valve body (1) via a vertical rod (32), and coaxially arranged sliding rods (33) are fixedly engaged on both end surfaces of the connecting plate (31), and the rod sections of the two sliding rods (33) facing each other are both provided with threaded sections (331); Each of the sliding rods (33) is provided with a connecting tube assembly (34), and the connecting tube assembly (34) comprises a sleeve ring (341), the sleeve ring (341) is sleeved on the sliding rod (33) and is slidably connected to the sliding rod (33), and a threaded rod (344) is installed on the sleeve ring (341), and the other end of the threaded rod (344) is inserted into a corresponding connecting hole (2a) of the flange ring (2); A threaded fastening nut (35) is sleeved on the threaded section (331) provided on the sliding rod (33).

2. The eccentric large diameter flange butterfly valve according to claim 1 is characterized in that: A connecting rod (342) is fixedly mounted on the outer ring wall of the sleeve ring (341), and a rod cap (343) is fixedly mounted on the other end of the connecting rod (342), and the threaded rod (344) is fixedly mounted on the rod cap (343).

3. The eccentric large diameter flange butterfly valve according to claim 2 is characterized in that: A spring (36) is sleeved on the sliding rod (33), one end of the spring (36) is fixedly connected to the end surface of the connecting disk (31), and the other end of the spring (36) is fixedly connected to the inner ring wall of the sleeve ring (341).

4. The eccentric large diameter flange butterfly valve according to claim 1, characterized in that: The threaded rod (344) has the same specifications as the threaded section (331) on the sliding rod (33).

5. The eccentric large diameter flange butterfly valve according to claim 1, characterized in that: The connection plate (31) is located in the middle of the valve body (1), and the ends of the sliding rods (33) on both sides of the connection plate (31) are at the same distance from the flange rings (2) on both sides.

6. The eccentric large diameter flange butterfly valve according to claim 5, characterized in that: The length of the sleeve ring (341) is greater than the distance between the end of the sliding rod (33) and the flange ring (2).

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